On Sat, Nov 15, 2008 at 09:14:07AM +1100, Petr Janda wrote:
> Hi all,
> I have got reports about lost mail(not received, im the receiver not the
> sender) recently and trying to find out whats going on seems to be beyond me.
>
> Basically a lot of email is lost with "timeout after DATA"
>
> For example:
> timeout after DATA (0 bytes) from mail.securepay.com.au[203.89.212.166]
>
> . Supposedly the problem here is that the sending machine has got a firewall
> in front of it thats blocking ICMP MUST FRAGMENT. I somewhat could verify
> this by trying to ping those machines and indeed pinging them does not
> work(so at least ICMP ECHO is blocked).
Or botching window scaling, or getting confused by selectiv ACKs, or ...
Consider disabling window scaling support (not just setting the default
scale to zero). Consider capturing the packet stream outside your
outermost firewall.
--
Viktor.
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